Switch stand



W. M BROWN, l". BURTON, AND S. C. WEKS.

SWITCH STAND, APPsjscAloN FILED Amm. 1922.

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mma-away@ JVx M. BROWN, C. BURTON, AN S. C. WEEKS SWITCH STAND.

FLICATION FILED APR.25, 1922.

SWH'CH STAND.

APPLICATION man mmm,

Pa/ammi Got. l0? i923 3 SHEETS-'SHEET 3.

Patented @et l0, 1922. l UNT@ STATES PATENT WILLAM MILTON BROWN, CARROLL BURTON, ANDiSAT/IUEL C. WEEKS TOWN, PENNSYLVANIA.

SWITCH STAND.

Application led April 25, 1922. Serial No. 556,409.

To all whom z'zmag/ concern.' l upper end of the spindle 5 i e it known that we, WILLIAM MILTON squared socket 8 adapte ROWN, CARROLL BURTON, and SAMUEL C. squared lower end of a short slee Vanns, citizens of'the United States, and 9 having asquared aperture es 5 residents of Johnstown. in the county of trally therethrough for the reception of a 6G Cambria and State of Pennsylvania, have squaresleeve member 10. invented certain new and useful Improve- A target shaft 11 extends through theA ments in Switch Stands7 of which the followsleeve 1 0, spindle 5 and base 2, and is adapting is a specication. ed to carry the usual target 11 on its ripper' l This invention relates to switch stands and end and is provided with an offset head 65 more particularly to vertical switch stands 12 having a screw threaded aperture 13 aving means for preventingthe breakage therein for the reception of an adjustable of parts when the switch is trailed. connecting arm 14 adapted to have its forked witch stands ofthe class to which this end pivotally connected to the switchl operl invention belongs are provided with spring ating rod 15.

pressed members adapted to normally pre- The portion of the shaft 11 w vent manual operation of the target shaft sleeve l0 is of squared cross sectio while being sufiiciently resilient to allow the form a close lit with the sleeve and carry it shaft to turn when the switch is trailed. with the shaft when the shaft is rotated,

These members are known as spring harps while the portion of the shaft below the 75 'and engage a cam member carried on the 4sleeve 10 and within the spindle 5 is cylinlower end of the target shaft. drical so as to rotate relative to the spindle.

ne object of the present invention is to F rom the above it will be readily seen provide a novel form of spring harp and that when the sleeve member 9 is in its lower guide for these switch stands. position, that is tted within the socket 8 in 80 Another object is to provide a switch the upper end of the spindle 5, the spindle stand having the novel design, Construction, must be rotated with the shaft 11. However, and combination of parts hereinafter deit is desired to normally rotate the shaft scribed and illustrated in the accompanying 11 without rotating the spindle 5 drawings. 1 therefore it is necessary to raise or lift the 35 In the drawings, Figure lis a side elevasleeve 9 out of the socket 8 and for this tion of a switch, stand embodying this inpurpose a lever 16 is pivotallly mounted on vention. the sleeve 10 and is connected by links 17 Figure 2 is a vertical sectional elevation to bosses 18 on the sleeve 9. By lifting the thereof. lever 16 upwardly the sleeve 9 will be moved 990 Figure 3 is a sectional plan on the line vertically upward along the sleeve 10 until III- III of Figure 2. it is free of the socket 8 when the shaft 11 Figures 4, 5, 6 and 7 are detail views ot' may berotated to throw the switch. A latch the harp guide. 19 is provided on the sleeve 9 and is adapted 40 Referring more particularly to the drawto project through a suitable aperture 2G in 95 ings, the numeral 2 designates the hollow the lever 16 wlw-r1 the sleeve 9 is in its lower base of the stand as a whole, which is composition. An aperture 21 is provided in the posed of a single casting and has a centrally latch 19 adapted to receive a padlock 22 or disposed integral tubular standard 3 proother similar locking device.

jecting upwardly therefrom. The bottom In order to prevent manual operation of 1GO wall 4 of the base 2 is provided with a boss the switch stand when the lever 16 is locked forming a bearing for a hollow spindle memin its lower position and the4 sleeve 9 is enber 5 which is mounted for rotation within gaged in the socket 8 in spindle 5, and yet the base and extends upwardly within the allow operation ofthe switch stand when it standard 3 and .is provided with a flange 6 is trailed, a novel spring pressed locking 105 adjacent its upper end adapted to bear means is provided. This lockingmeans'com against the upper end of the stand. The prises a coil spring` 23 mounted in each end lower end of the spindle 5 is substantiallyv of the base 2 and having spring `harpe 24 `square in cross section and forms a 'cam mounted in their free ends. he spring block for a purpose to be described. The harps comprise a head portion 25 -and a are 7o ithin vthe n so as to shank portion 26. The head portion of the spring harps is cut away .forming a bearing recess l27 in which is journaled a bearing roller 28 adapted to engage the cam 'block 7 on the spindle 5. rThe cam block 7 has its side faces cut away forming roller receiving recesses 29, thereby forming seats tor the rollers and causing them to more firmly hold the spindle against rotation.

The hads of the spring harps are provided withv jaws 30 on their side faces, which are spaced apart to receive the tongue 3l of a harp guide 32. The harp guides 32 comprise al tubular body. portion mounted on a vertical pivot 33 and having the tongue 31 projecting outwardly therefrom and up- 'per and lower horizontal Hanges 34 and 35, respectively, formed integral with. said body portion and said tongue, forming a shroud for and strengthening said tongue and also iitting over top and bottoni faces of the jaws 3() to prevent vertical movement of the spring harps. `The upper lange 34 Yis provided with a projection 36 adapted to "abut the side wall of thebase and limit the rearward movement of the spring harp.

The curved bearing faces of the flanges y 34 and 35 of the harp guides are eccentric the harp, thus enabling the point of the cam 7 to snap over the wheel 28. After the cam has snapped over the wheel 28 the spring harp will again be moved to its forward position by the action of the spring 7 and the guides will be moved forward so that the rear portions of the flanges 34 and 35` will bear against the harp and prevent sidewise movement thereof.

'I he tension of the springs 23 against the spring harps is such that the shaft l1 cannot be turned manually unless the sleeve. 9

. is raised so as to permit rotation of the'shaft l1 without operating the spindle 5.

The switch stand shown is what is known .as the medium design, and while this design is shown for convenience, it will he understood that the same oonstructionand novel combination of parts may be adapted to ywhat are lrnown as high and low designs bly simply making the standard 3, spindle 5, seeves 9 and 10, and shaft 11 higher or lower as desired, the base remaining substantially as shown in' the present construcltion. It will he understood that we do not wish to be limited'to the enact constructionsl and Meisen combination of parts shown and described, since various modifications may be made without departing from the scope of the in-v vention as defined in the appended claims.

We claim 1. In a switch having a hollow hase member, a centrally disposed spindle mounted vwithin said base member, and a cam block `adapted to guide said spring harps, said guides comprising a tubular body portion mounted on a vertical pivot member, and a horizontal tongue portion projecting outwardly at right angles to, said body portion and engaged between the jaws on said spring harp.

ln a switch having a hollow base ineinber, a centrally disposed spindle mounted within said base member, and a cani block on the lower end of said spindle, means for normally holding said spindle against rota tion, said means comprising a coil spring mounted in each endof said base, a spring harp extending within and bearing against the out-er end of each oi' said springs, bearing rollers journaled in the outer end of each of said spring harps and adapted to engage the side faces of said cam block, a pair of jaws projecting outwardly from each side of said spring liarps, and harp guides pivotally mounted within said base adapted to guide said spring harps, said guides comprisinga tubular body portion mounted on a vertical pivot member, a horizontal tongue portion formed-integral with said body and projecting outwardly at i'iglit angles thereto and adapted to be engaged between the jaws on said spring harp, and upper and lower hori- -zontal flanges oi greater width than said tongue formed integral with said bodypors tion and said tongue forming a shroud for and strengthening said tongue and limiting the vertical'inovement of said spring liarps relative to saidguides.

3. In a switch having a hollow base ineinber, a centrally disposed'spindle mounted within said base member, and a cam block on the lower end of said spindle, means or normally holding said spindle against rota-A tion, said, means comprising a coil spring mounted iny each end of said base, a spring harp extending within and bearing against the outer end of each of said sprin s. bearing rollers journaled in the outer en of each of said spring harps and adapted to engage the side faees ot' said eam blockr` a pair of jaws` projeetin; outwardlxv from each side of said springr harps. and harp guides pivotall \v mounted within said base adapted to guideI said spring harps, said guides eomprising a tubular bodj; portion mounted on a vertical pivotmember, a horizontal tongue portion formed integral with said bod)Y and projecting outwardl)v at right angles thereto and adapted to he engaged between theV jaws on said springy harp` and upper and lower hori` zoutal flanges of greater width than said tongue formed integral with said bod)v por tion and said tongue Jforming a shroud for and strengthening' said tongue and limiting the vertieal movement ot' said spring harps relative to said guides, and a stop lug on the upper flange ot' said harp guide adapted to limit the rearward movement of said guide and said harp.

4. ln a switch stand having a hollow base member provided with a centrally disposed hollow integral standard projecting upwardly therefrom, a hollow spindle mounted for rotation within said standard and base, a cam hloek 011 the lower end ot' said spindle, a sleeve litted within a socket in the upper fr) k-f) end of said spindle. means for locking said sleeve ,against rotation relative to said spindle. a square sleeve fitted within a squared aperture in said first named sleeve7 and a target shatt passing through said squared sleeve, said spindle and said base, said shaft being squared to itwithin said squared sleeve. a coiled spring mounted in each end ot' said base, a spring harp extending 'within and bearing against the outer end of each ot' said springs. bearing rollers journaled in the outer end of each ot said harps and adapted to engage the side taees of said earn block. a pair ot jaws projecting outwardlyv from eaeh side otsaid spring harps, and harp guides pivoted within said base adapted to guide said spring hai-ps, said guides comprising a tubular bod)v portion mounted on a vertical pivot member, and a tongue portion projecting outward from said body portion and engaged between .the jaws on said spring harp.

In testimony whereof we have hereunto set our hands.

WILLIAM MILToN BRoWN. oARnoLL BURTON. saMUEL o. WEEKs. 

